dsh-pour-over: Return a coffee brewing recipe based on parameters

In the DeepSeek Harness (DSH) ecosystem, the `dsh-pour-over` plugin enables model reasoning to generate pour-over coffee brew plans based on specific parameters. Maintained by uckkk, it is implemented purely in Node.js, has no network dependencies, and is licensed under the MIT License. Before installation, the dependencies `@deepseek-ai/cordis` (^4.0.1) and `@deepseek-ai/dsh-tools` (>=0.1.0-rc.6) must be satisfied. Once installed, its tools can be invoked in a session.